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INTANGIBLE ASSETS - Cash Generating Units (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Disclosure of information for cash-generating units [line items]    
Total $ 16,509 $ 14,521
North american residential energy infrastructure operation    
Disclosure of information for cash-generating units [line items]    
Total 2,988 3,006
Brazilian regulated gas transmission operation    
Disclosure of information for cash-generating units [line items]    
Total 2,567 2,299
Canadian diversified midstream operation    
Disclosure of information for cash-generating units [line items]    
Total 1,726 1,718
North american rail operation    
Disclosure of information for cash-generating units [line items]    
Total 1,689 1,674
European residential decarbonization infrastructure business    
Disclosure of information for cash-generating units [line items]    
Total 1,313 1,196
Indian telecom towers operation    
Disclosure of information for cash-generating units [line items]    
Total 1,150 1,175
Brazilian electricity transmission operation    
Disclosure of information for cash-generating units [line items]    
Total 2,561 1,023
Global intermodal logistics operation    
Disclosure of information for cash-generating units [line items]    
Total 568 577
U.K. telecom towers operation    
Disclosure of information for cash-generating units [line items]    
Total 599 549
North american retail colocation data center operation    
Disclosure of information for cash-generating units [line items]    
Total 428 454
U.K. port operation    
Disclosure of information for cash-generating units [line items]    
Total 293 267
Other    
Disclosure of information for cash-generating units [line items]    
Total $ 627 $ 583